The ornamental design for a clutchbag, as shown and described.
1. Clutch bag
1.1 : Perspective
1.2 : Front
1.3 : Back
1.4 : Right
1.5 : Left
1.6 : Top
1.7 : Bottom
1.8 : Partially open perspective
1.9 : Completely open perspective
The clutch bag comprises a substantially rectangular body and a strap; on the front the body has a flap that tapers downwards; the lower end of said flap has a horizontally elongated H-shaped pattern on the outside; the clutch furthermore comprises a clasp including a catch element carried by the body and having a substantially horizontally elongated H-shaped relief; the seams of the clutch bag are not claimed features.